diff --git a/components/mcp23Sxx.rst b/components/mcp23Sxx.rst
new file mode 100644
index 000000000..71f4f35d4
--- /dev/null
+++ b/components/mcp23Sxx.rst
@@ -0,0 +1,128 @@
+MCP23Sxx I/O Expander
+=====================
+
+.. seo::
+    :description: Instructions for setting up MCP23S08, MCP23S16 or MCP23S17 digital port expander in ESPHome. This is exactly the same API as the MCP23SXX I/O Expander except talks on the SPI bus
+    :image: mcp23Sxx.png
+
+The Microchip MCP23Sxx series of general purpose, parallel I/O expansion for SPI bus applications.
+This is exactly the same API as the MCP23SXX I/O Expander except talks on the SPI bus
+
+**Supported Variants :**
+
+- :ref:`mcp23S08-label`
+- :ref:`mcp23S17-label`
+
+.. _mcp23S08-label:
+
+MCP23S08
+--------
+
+The MCP23S08 component (`datasheet <http://ww1.microchip.com/downloads/en/DeviceDoc/MCP23008-MCP23S08-Data-Sheet-20001919F.pdf>`__,
+`Digi-Key <https://www.digikey.com/product-detail/en/microchip-technology/MCP23S08-E-P/MCP23S08-E-P-ND/735954>`__) has 8 GPIOs that can be configured independently.
+
+.. code-block:: yaml
+
+    # Example configuration entry
+    mcp23s08:
+      - id: 'mcp23s08_hub'
+        cs_pin: D8
+        deviceaddress: 0
+
+    # Individual outputs
+    switch:
+      - platform: gpio
+        name: "MCP23S08 Pin #0"
+        pin:
+          mcp23s08_id: mcp23s08_hub
+          # Use pin number 0
+          number: 0
+          # One of INPUT, INPUT_PULLUP or OUTPUT
+          mode: OUTPUT
+          inverted: False
+
+    # Individual inputs
+    binary_sensor:
+      - platform: gpio
+        name: "MCP23S08 Pin #1"
+        pin:
+          mcp23s08_id: mcp23s08_hub
+          # Use pin number 1
+          number: 1
+          # One of INPUT or INPUT_PULLUP
+          mode: INPUT
+          inverted: False
+
+Configuration variables:
+~~~~~~~~~~~~~~~~~~~~~~~~
+
+- **id** (**Required**, :ref:`config-id`): The id to use for this MCP23S08 component.
+- **cs_pin** (*Required*, int): The SPI chip select pin to use  
+- **deviceaddress** (*Optional*, int): The address of the chip.
+  Defaults to ``0``.
+
+
+.. _mcp23S17-label:
+
+MCP23S17
+--------
+
+The MCP23S17 component allows you to use MCP23S17 I/O expanders
+(`datasheet <http://ww1.microchip.com/downloads/en/DeviceDoc/20001952C.pdf>`__,
+`Digi-Key <https://www.digikey.com/product-detail/en/microchip-technology/MCP23S17-E-SP/MCP23S17-E-SP-ND/894276>`__) in ESPHome.
+It uses the :ref:`SPI Bus <spi>` for communication.
+
+Once configured, you can use any of the 16 pins as
+pins for your projects. Within ESPHome they emulate a real internal GPIO pin
+and can therefore be used with many of ESPHome's components such as the GPIO
+binary sensor or GPIO switch.
+
+.. code-block:: yaml
+
+    # Example configuration entry
+    mcp23s17:
+      - id: 'mcp23s17_hub'
+        cs_pin: D8
+        deviceaddress: 0
+
+    # Individual outputs
+    switch:
+      - platform: gpio
+        name: "MCP23S17 Pin #0"
+        pin:
+          mcp23s17_id: mcp23s17_hub
+          # Use pin number 0
+          number: 0
+          mode: OUTPUT
+          inverted: False
+
+    # Individual inputs
+    binary_sensor:
+      - platform: gpio
+        name: "MCP23S17 Pin #1"
+        pin:
+          mcp23s17_id: mcp23s17_hub
+          # Use pin number 1
+          number: 1
+          # One of INPUT or INPUT_PULLUP
+          mode: INPUT_PULLUP
+          inverted: False
+
+Configuration variables:
+~~~~~~~~~~~~~~~~~~~~~~~~
+
+- **id** (**Required**, :ref:`config-id`): The id to use for this MCP23S17 component.
+- **cs_pin** (*Required*, int): The SPI chip select pin to use.
+- **deviceaddress** (*Optional*, int): The address of the chip.
+  Defaults to ``0``.
+
+
+See Also
+--------
+
+- :ref:`spi`
+- :doc:`switch/gpio`
+- :doc:`binary_sensor/gpio`
+- :apiref:`API Reference (MCP23S08) <mcp23S08/mcp23S08.h>`
+- :apiref:`API Reference (MCP23S17) <mcp23S17/mcp23S17.h>`
+- :ghedit:`Edit`
diff --git a/index.rst b/index.rst
index 37fd9e194..ad66e00f2 100644
--- a/index.rst
+++ b/index.rst
@@ -349,7 +349,8 @@ Misc Components
     Servo, components/servo, servo.svg
 
     PCF8574 I/O Expander, components/pcf8574, pcf8574.jpg
-    MCP230XX I/O Expander, components/mcp230xx, mcp230xx.svg
+    MCP230XX I/O Expander - I²C Bus, components/mcp230xx, mcp230xx.svg
+    MCP23SXX I/O Expander - SPI Bus, components/mcp23Sxx, mcp230xx.svg
     MCP3008 8-Channel 10-Bit A/D Converter, components/mcp3008, mcp3008.png
     SX1509 I/O Expander, components/sx1509, sx1509.jpg
     SN74HC595 I/O Expander, components/sn74hc595, sn74hc595.jpg